Q. The purpose of providing bleed points in the evaporator is to

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Q. Water always boils when its

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Q. A multiple effect evaporator as compared to a single effect evaporator of the same capacity has

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Q. When does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids ?

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Q. The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re^0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter (D) as

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Q. A long iron rod initially at a temperature of 20°C has one end dipped in boiling water (100°C) at time, t = 0. The curved surface of the rod is insulated so that heat conduction is one dimensional in the axial direction. The temperature at a distance 100 mm from the dipped end becomes 40°C at time, t = 200 s. The same temperature is achieved at a distance of 200 mm from the dipped end at time

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Q. LMTD for evaporators & condensers for a given terminal parameters & set of conditions for counterflow is equal to that for parallel flow. In such heat exchangers, with one of the fluids condensing or evaporating, the surface area required is the least in the __________ flow.

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Q. Thermal diffusivity of a material

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Q. h.D/K is called the __________ number.

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Q. Prandtl number is the ratio of

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Q. Conductance is given by(where, x = thickness, A = heat flow area, K = thermal conductivity.)

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Q. Heat flux, as defined in heat flow is analogous to __________ in electricity flow.

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Q. The wavelength at which the maximum monochromatic emissive power occurs for a black body, is (where, T = absolute temperature of the black body)

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Q. Which is the most suitable for cold viscous feed?

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Q. Dropwise condensation is promoted on a/an __________ surface.

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Q. At Pr > 1, conduction in an ordinary fluid flowing through a heated pipe is limited to the

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Q. In a single evaporator system, the steam economy __________ by creating vacuum in the evaporator.

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Q. A tank painted with which of the following coloured paints, would heat up maximum by radiation from sun ?

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Q. The separation of liquid droplets from the vapor is done by a/an __________ , in the evaporators.

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Q. If a single tube pass heat exchanger is converted to two pass, then for the same flow rate, the pressure drop per unit length in tube side will

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